I think it is still a physical line from the PowerShell perspective and two from the textual perspective.

I think the idea of one-liner is very much misunderstood. Many think adding semi-colons makes a one-liner. Other think it all has to be on one visual line wrapped 10 times.

White space has been considered god since early 'C'. Read K & R. They created C to ignore all white space and forms control so it could be used to format the display anyway that was needed to make the code readable.

Assembler and Fortran in those days was horrible. After C was released all version of Fortran, Cobol and Macro assembler started allowing white space anywhere. ( Fortran and assembler require a character in column 2 in all early version.)